<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>Highcharts Example</title>

    <script type="text/javascript" src="../../js/jquery-1.8.2.min.js"></script>
    <style type="text/css">
        ${demo.css}
    </style>
    <script type="text/javascript">
        $(function () {
            $('#container').highcharts({

                    chart: {
                        type: 'gauge',
                        plotBorderWidth: 1,
                        plotBackgroundColor: {
                            linearGradient: {x1: 0, y1: 0, x2: 0, y2: 1},
                            stops: [
                                [0, '#FFF4C6'],
                                [0.3, '#FFFFFF'],
                                [1, '#FFF4C6']
                            ]
                        },
                        plotBackgroundImage: null,
                        height: 200
                    },

                    title: {
                        text: 'VU meter'
                    },

                    pane: [{
                        startAngle: -45,
                        endAngle: 45,
                        background: null,
                        center: ['25%', '145%'],
                        size: 300
                    }, {
                        startAngle: -45,
                        endAngle: 45,
                        background: null,
                        center: ['75%', '145%'],
                        size: 300
                    }],

                    yAxis: [{
                        min: -20,
                        max: 6,
                        minorTickPosition: 'outside',
                        tickPosition: 'outside',
                        labels: {
                            rotation: 'auto',
                            distance: 20
                        },
                        plotBands: [{
                            from: 0,
                            to: 6,
                            color: '#C02316',
                            innerRadius: '100%',
                            outerRadius: '105%'
                        }],
                        pane: 0,
                        title: {
                            text: 'VU<br/><span style="font-size:8px">Channel A</span>',
                            y: -40
                        }
                    }, {
                        min: -20,
                        max: 6,
                        minorTickPosition: 'outside',
                        tickPosition: 'outside',
                        labels: {
                            rotation: 'auto',
                            distance: 20
                        },
                        plotBands: [{
                            from: 0,
                            to: 6,
                            color: '#C02316',
                            innerRadius: '100%',
                            outerRadius: '105%'
                        }],
                        pane: 1,
                        title: {
                            text: 'VU<br/><span style="font-size:8px">Channel B</span>',
                            y: -40
                        }
                    }],

                    plotOptions: {
                        gauge: {
                            dataLabels: {
                                enabled: false
                            },
                            dial: {
                                radius: '100%'
                            }
                        }
                    },


                    series: [{
                        data: [-20],
                        yAxis: 0
                    }, {
                        data: [-20],
                        yAxis: 1
                    }]

                },

                // Let the music play
                function (chart) {
                    setInterval(function () {
                        var left = chart.series[0].points[0],
                            right = chart.series[1].points[0],
                            leftVal,
                            rightVal,
                            inc = (Math.random() - 0.5) * 3;

                        leftVal = left.y + inc;
                        rightVal = leftVal + inc / 3;
                        if (leftVal < -20 || leftVal > 6) {
                            leftVal = left.y - inc;
                        }
                        if (rightVal < -20 || rightVal > 6) {
                            rightVal = leftVal;
                        }

                        left.update(leftVal, false);
                        right.update(rightVal, false);
                        chart.redraw();

                    }, 500);

                });
        });
    </script>
</head>
<body>
<script src="../../js/highcharts.js"></script>
<script src="../../js/highcharts-more.js"></script>
<script src="../../js/modules/exporting.js"></script>

<div id="container" style="width: 600px; height: 300px; margin: 0 auto"></div>

</body>
</html>
